As villains go, Starro the Conquerer was not one of
the most terrifying villains. The main reason was that
this scourge of the galaxy was a 3 ton blue starfish
with a bullseye on its stomach. Starro's main ability
was to hypnotize his enemies, sapping the will of
his opponents.

In his first encounter with the Justice League of America,
Starro transformed three ordinary starfish into his
emissaries of doom. The Justice League split up defeating
the three starfish and then fought Starro himself. The
League was able to defeat Starro with the help of Snapper
Carr, their soon-to-be teen sidekick, by pouring lime
on the would-be conquerer.

Although a really bad idea to start with, Starro has reappeared
over the years to menace the Justice League again.